Knock Out Drums Dealers

manufactures knockout drums which remove any liquid droplets that carry over with the gas relief sent to a flare or any other gas utilization or recovery system. It is designed to remove oilliquidother suspensions to maximum achievable level as per the site conditions. CRA offers Horizontal as well as Vertical orientation Knock-out Drums. The selection is made based on the process parameters, project requirements and site conditions.

• Size: 29” x 8.2’
• Liquid: 3000 bpd.
• Gas: 3 mmscfd.
• Design Pressure: 100PSI.

  The flare knockout drum requires continuous, accurate level monitoring to keep liquids from reaching the flare and creating a potential fire hazard. In order to ensure safety by performing this critical measurement, a VEGAFLEX 81 guided wave radar tracks the total process level over the span of the knockout drum, as well as the vessel's interface level. The information is continuously reported to the operator for proper control. The VEGAFLEX 81 has no moving parts, reducing maintenance requirements. For level measurement in the boot of the flare knockout drum, a VEGAMAG 63 provides remote reporting and local visualization. The accuracy of the measurement provided by the VEGAMAG 63 helps the operator determine the liquid level in the drum, recovering water to be sent to the water treatment plant and keeping entrained liquid from reaching the flare. The small size of the VEGAMAG 63 allows it to easily fit within mounting constraints, even when space is limited.

Fabricating process plant equipments such as Pressure Vessels, Kettles, Agitators, Reactors, Distillation Columns, Exchangers, Bleachers, Crystallizers, Cookers, Maturators, Toasters, Filters etc

Knock out drums are also called as free water knock outs. Knock out drums are widely used in three locations of a processing plant which is Located at the suction of compressor - the purpose is to knock out free water or liquid from gas to enter compressor, Located at the bottom of the Flare stack - working to knock out free liquid and to avoid liquid entrainment, Free water knock outs or oil- gas -water separator are not actually treating vessels, they are used many time in conjunction with treating systems. Free water knock out drums are normally large open settling space which allows gravity separation of oil and free water streams. Variations of free water knock outs are often used to accomplish specific treating purposes.

SGIL have worked in major refineries in India covering Detail Engineering of Structure, Tankages etc. Erection of Heavy Equipment, Exchangers, Heaters, Columns, Vessels, Fabrication & Erection of all type of UG AG Piping work of process Plants and Utilities including NDT Works. Tanks, Electrical, Instrumentation & Structures including Painting, Fireproofing & specialised lining of Reactors. Equipment Internals, Chemical Cleaning, Catalyst Loading, Strengthening of old civil Structure, Insulation of piping & Equipment. Revamp and Turn Around of Process Plant and Utilities, Retrofitting, Revamp of equipment.

The Knock out drum is a vessel in the flare header designed to remove & accumulate condensed & entrained liquids from the relief gases. Both the horizontal & vertical design is a common consideration for the Knock out drum, which is determined based on the operating parameters as well as other plant conditions. If a large liquid storage capacity is desired and the vapour flow is high, a horizontal drum is often more economical. Also, the pressure drop across horizontal drums is generally the lowest of all the designs. Vertical knockout drums are typically used if the liquid load is low or limited plot space is available. They are well suited for incorporating into the base of the flare stack. DESIGN FEATURES Although horizontal and vertical knockout drums are available in many configurations, the differences are mainly in how the path of the vapour is directed. The various configurations include the following: Horizontal drum with the vapour entering one end of the vessel and exiting at the top of the opposite end (no internal baffling) Vertical drum with the vapour inlet nozzle entering the vessel radially and the outlet nozzle at the top of the vessel's vertical axis. The inlet stream should be baffled to direct the flow downward Vertical vessel with a tangential nozzle. Vertical centrifugal separators differ from vertical settling drums in that the flow enters tangentially and spins around a centre tube, which extends below the liquid inlet nozzle. The gas and liquid flow radially downward through the annulus causing liquid droplets to coalesce along the walls and collect in the bottom of the drum. The vapour changes direction once below the centre tube and flows upward to the outlet nozzle. To avoid liquid re-entrainment, vapour velocity has to be kept low in the turnaround section of the drum. An additional measure to prevent liquid re-entrainment is a baffle plate below the turnaround section of the drum. The maximum liquid level is the same as vertical settling drums Horizontal drum with the vapour entering at each end on the horizontal axis and a centre outlet Horizontal drum with the vapour entering in the centre and exiting at each end on the horizontal axis Combination of a vertical drum in the base of the flare stack and a horizontal drum upstream to remove the bulk of the liquid entrained in the vapour. This combination permits the use of larger values for the numerical constant in the velocity equation.  

A knockout drum with a mist eliminator is common whenever a process requires entrained droplets to be separated from vapour stream. A simple knockout drum (without a mist eliminator) will remove droplets larger than about 380 microns by gravity settling. Generally, gravity settling removes 90% of the liquid entering the vessel. However, the remaining droplets smaller than 380 microns can be significant problem for a downstream unit. A mist eliminator at the top of the knockout drum will remove the remaining droplets down to a diameter of 6 microns or less, depending on the type of mist eliminator. A knockout drum with mist eliminator can achieve an overall efficiency of 99% liquid remova.

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